My client encountered a similar error message with SMOS + MSI 170A Gaming 5M Mobo + 8x570 right after clearing CMOS.  It could be related to your BIOS settings.

I had him set his BIOS to the following configuration, and it solved it for him.

Advanced Mode (F7) -> Settings -> Advanced Settings -> PCI-E Subsystem Settings -> set 4G DECODE to ENABLE.
set PEG1 to "GEN 2"
set PEG2 to "GEN 2"
set PCI Latency to "96 Cycles"

Regards,
Patrick T